Content .. 88 89 90 91 ..

Mitsubishi Galant. Manual - part 90

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-41

DTC P0107: Barometric Pressure Circuit Low Input

CIRCUIT OPERATION

•

A 5-volt voltage is supplied to the barometric
pressure sensor power terminal (terminal 1) from
the PCM (terminal 46). The ground terminal
(terminal 5) is grounded with PCM (terminal 57).

•

A voltage that is proportional to the atmospheric
pressure is sent to the PCM (terminal 55) from
the barometric pressure sensor output terminal
(terminal 2).

AK000460

4 5 6

1 2 3

GREEN-

YELL

GREEN-

WHITE

ACK

C-40
(MU803781)

POWERTRAIN CONTROL
MODULE(PCM)

B-14

BAROMETRIC PRESSURE SENSOR
(INCORPORATED IN VOLUME AIR
FLOW SENSOR)

42 43
48 49 50 51 52 53 54 55 56 57

58 59

60 61 62 63

64 65 66

ACX02480

CONNECTOR : B-14

BAROMETRIC
PRESSURE
SENSOR

AK000280

CONNECTOR : C-40

PCM

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

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TECHNICAL DESCRIPTION

•

The barometric pressure sensor outputs a
voltage which corresponds to the barometric
pressure.

•

The PCM checks whether this voltage is within a
specified range.

DTC SET CONDITIONS

Check Conditions

•

Two seconds or more have passed since the
starting sequence was completed.

•

Battery positive voltage is higher than 8 volts.

Judgement Criteria

•

Barometric pressure sensor output voltage has
continued to be 1.95 volts or lower
[corresponding to a barometric pressure of 50
kPa (7.3 psi) or lower] approximately 15,000 ft
above sea level for 10 seconds.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

•

Barometric pressure sensor failed.

•

Open or shorted barometric pressure sensor
circuit, or loose connector.

•

PCM failed.

DIAGNOSIS

Required Special Tools
MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item 25:
Barometric Pressure Sensor.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item

25, Barometric Pressure Sensor.

•

When altitude is 0 m(0 foot), 101 kPa.

•

When altitude is 600 m(1,969 feet), 95 kPa.

•

When altitude is 1,200 m(3,937 feet), 88 kPa.

•

When altitude is 1,800 m(5,906 feet), 81 kPa.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points(

P.00-8

NO : NO: Go to Step 2.

AC003081 AB

16 PIN

MB991502

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

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STEP 2. Check the sensor output voltage at barometric
pressure sensor connector B-14 by backprobing.
(1) Do not disconnect the connector B-14.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground by

backprobing.

•

When altitude is 0 m(0 foot), voltage should be 3.7 and
4.3 volts.

•

When altitude is 600 m(1,969 feet), voltage should be
3.4 and 4.0 volts.

•

When altitude is 1,200 m(3,937 feet), voltage should be
3.2 and 3.8 volts.

•

When altitude is 1,800 m(5,906 feet), voltage should be
2.9 and 3.5 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 3.
NO : Go to Step 7.

STEP 3. Check the sensor output voltage at PCM
connector C-40 by backprobing.
(1) Do not disconnect the connector C-40.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 55 and ground by

backprobing.

•

When altitude is 0 m(0 foot), voltage should be 3.7 and
4.3 volts.

•

When altitude is 600 m(1,969 feet), voltage should be
3.4 and 4.0 volts.

•

When altitude is 1,200 m(3,937 feet), voltage should be
3.2 and 3.8 volts.

•

When altitude is 1,800 m(5,906 feet), voltage should be
2.9 and 3.5 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 4.
NO : Go to Step 6.

AKX01520AC

B-14 CONNECTOR
HARNESS
SIDE VIEW

1 2 3 4 5 6 7

AK000282

C-40 CONNECTOR
HARNESS SIDE VIEW

46
57
66

45
56
65

44
55

43
49

42
48
59

41
47
58

53
63

52
62

51
61

50
60

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-44

STEP 4. Check connector B-14 at the barometric pressure
sensor and connector C-40 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection(

P.00E-2

). Then go to Step 18.

STEP 5. Using scan tool MB991502, check data list item 25:
Barometric Pressure Sensor.

CAUTION

25, Barometric Pressure Sensor.

•

When altitude is 0 m(0 foot), 101 kPa.

•

When altitude is 600 m(1,969 feet), 95 kPa.

•

When altitude is 1,200 m(3,937 feet), 88 kPa.

•

When altitude is 1,800 m(5,906 feet), 81 kPa.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points(

P.00-8

NO : Replace the ECM or PCM. Then go to Step 18.

ACX02480

CONNECTOR : B-14

BAROMETRIC
PRESSURE
SENSOR

AK000280

CONNECTOR : C-40

PCM

AC003081 AB

16 PIN

MB991502

Content .. 88 89 90 91 ..